Russell Tice, a longtime insider at the National Security Agency, is now a whistleblower the agency would like to keep quiet. For 20 years, Tice worked in the shadows as he helped the United States spy on other people's conversations around the world. I specialized in what's called special access programs," Tice said of his job. "We called them 'black world' programs and operations." But now, Tice tells ABC News that some of those secret "black world" operations run by the NSA were operated in ways that he believes violated the law. He is prepared to tell Congress all he knows about the alleged wrongdoing in these programs run by the Defense Department and the NSA. Tice says the technology exists to track and sort through every domestic and international phone call...and to search for key words or phrases that a terrorist might use. President Bush has admitted that he gave orders that allowed the NSA to eavesdrop on a small number of Americans without the usual requisite warrants. But Tice disagrees. He says the number of Americans subject to eavesdropping by the NSA could be in the millions. The NSA revoked Tice's security clearance in May of last year based on what it called psychological concerns and later dismissed him. Tice calls that bunk and says that's the way the NSA deals with troublemakers and whistleblowers.